rectifier

/R EH1 K T AH0 F AY0 ER0/
noun
  1. 1

    Something that rectifies.

  2. 2

    A device that converts alternating current into direct current; often a diode.

  3. 3

    An instrument used for determining and rectifying the variations of the compass on board ship.

  4. 4

    (artificial neural networks) The activation function f(x) = \max(0, x), where x is the input to a neuron.

Source: https://en.wiktionary.org/wiki/rectifier